CVE-2021-3520

critical
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1954559

https://www.oracle.com//security-alerts/cpujul2021.html

https://www.oracle.com/security-alerts/cpuoct2021.html

Details

Source: MITRE

Published: 2021-06-02

Updated: 2021-10-20

Type: CWE-787

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:lz4_project:lz4:1.8.3:*:*:*:*:*:*:*

Tenable Plugins

View all (19 total)

IDNameProductFamilySeverity
153737EulerOS 2.0 SP9 : lz4 (EulerOS-SA-2021-2535)NessusHuawei Local Security Checks
critical
153696EulerOS 2.0 SP9 : lz4 (EulerOS-SA-2021-2559)NessusHuawei Local Security Checks
critical
153693EulerOS 2.0 SP5 : lz4 (EulerOS-SA-2021-2510)NessusHuawei Local Security Checks
critical
153603EulerOS 2.0 SP8 : lz4 (EulerOS-SA-2021-2474)NessusHuawei Local Security Checks
critical
153343EulerOS 2.0 SP2 : lz4 (EulerOS-SA-2021-2407)NessusHuawei Local Security Checks
critical
151706openSUSE 15 Security Update : lz4 (openSUSE-SU-2021:1825-1)NessusSuSE Local Security Checks
critical
151367CentOS 8 : lz4 (CESA-2021:2575)NessusCentOS Local Security Checks
critical
151148Oracle Linux 8 : lz4 (ELSA-2021-2575)NessusOracle Linux Local Security Checks
critical
151135RHEL 8 : lz4 (RHSA-2021:2575)NessusRed Hat Local Security Checks
critical
150929Photon OS 3.0: Lz4 PHSA-2021-3.0-0255NessusPhotonOS Local Security Checks
critical
150926Photon OS 2.0: Lz4 PHSA-2021-2.0-0357NessusPhotonOS Local Security Checks
critical
150918Photon OS 4.0: Lz4 PHSA-2021-4.0-0047NessusPhotonOS Local Security Checks
critical
150712Ubuntu 16.04 LTS : LZ4 vulnerability (USN-4968-2)NessusUbuntu Local Security Checks
critical
150182SUSE SLED15 / SLES15 Security Update : lz4 (SUSE-SU-2021:1825-1)NessusSuSE Local Security Checks
medium
149988Ubuntu 18.04 LTS / 20.04 LTS / 20.10 / 21.04 : LZ4 vulnerability (USN-4968-1)NessusUbuntu Local Security Checks
critical
149890openSUSE Security Update : lz4 (openSUSE-2021-760)NessusSuSE Local Security Checks
critical
149855Debian DSA-4919-1 : lz4 - security updateNessusDebian Local Security Checks
critical
149806SUSE SLED15 / SLES15 Security Update : lz4 (SUSE-SU-2021:1647-1)NessusSuSE Local Security Checks
medium
149460Debian DLA-2657-1 : lz4 security updateNessusDebian Local Security Checks
critical